Cylinder for internal combustion motors



. March 1935. J. J. MASCUCH 1,993,014

CYLINDER FOR INTERNAL COMBUSTION MOTORS Filed June 9, 1932 I N V EN TOR.0 055 Mmcucfl ATTORNEY s star orgies CYLINDER FGR ZINTERNAL CGDBUSTHQNMQ'EURS Joseph 3 Masciich, Newark, N J.

Application June 9, 1932, Serial No. 616,169

4 Claims. (ill. 123=Jl69- This invention relates to internal combustionof the cylinder of a motor, showing the spark plug and top shielding inelevation or plan;

When an internal combustion engine is oper- Figure 3 is a fragmentaryview of a portion of ated certain electrical emanations are released thecylinder taken approximately on line 33 5 from the spark plugs. Whereradio receiving of Figure 2, looking in the direction indicated 5 andsending equipmentis used in close proximity by the arrows, but showingthe spark plug in to the internal combustion engine the electrical plan;and, emanations from the spark plugs interfere with Fi ure 4 is a framentary d ail in nl the operation of the radio equipment. This isSection through the flange of the shielding eleespecially true inaircraft use where the engine ment. 10

and the radio equipment are necessarily located Referring to t d a Adesignates gene?- in close proximity. In order to prevent such inallythe cylinder wall and piston assembly of a terference with the radioequipment it is nec escommon form of internal combustion motor P sary toshield the spark plugs so as to ground Vided with cooling fins B and anopening C to reany electrical emanations which may lie released solvethe screw-threaded end of a common form from the spark plugs. of sparkplug D. Suitable electrical connections The object of the invention isto provide a means E are ma e to t Sp p D d it is S e ded for perfectlyshielding the spark plug so that the on top by a suitable constructionF, arranged to electrical emanations are grounded to the cylinder be d iposition y a bail This Construceo wall, Where removable fittings areused there tion may be of any w l known form t p Z0 isatendency toleakage through the minute spaces ably Of a COIlStruCtiOn Such as Shownin y oetween the screw-threaded face of the fitting pendingapplications, serial 431,755, filed and the screw-threaded space of theopening S p m 1930, Serial 550,076, filed into where the spark plug isintroduced, July 11, 1931, directed to radio shielding per se.

Therefore, one object of the invention is to Ihe cy i d head W811 A Whenit is Cast. is 25 provide a shielding element which is integral formed wa projecting W 5, p f a ly i with the wall of the cylinder so as toavoid any and Surrounding the Opening in t e W t0 possibility oiemanations from the spark plug r eiv h p rk pl D. Th outer n f theleaking outwardly from the motor so as to inter- W811 5 is 1 V d Withfinangular flange the so fere with radio receptivity. under face of whichis provided with slots 7, which so A further object of the invention toprovide m y be s at he tim h cylind r h or w such a shielding which iseasy of construction A'is cast. The slots '2 are adapted to receive theand which requires aminimum of machining. hitilri'leitl Div-angular ends3 0f t b G.

' A further object of the invention is to provide om the foregoingdescrip it Will be Seen such an integral shielding element as willcothat the Shielding e em nt formed by the Wall 5 operate with thesecuring means of known forms be lflrOdllced at the time Of Costing e yof removable shielding for the top of th l der and no machine work orassemblage is necesand which will permit the easy application of thesalty. The Shielding F is grounded to J top shielding to the integralshielding element and Outer e 0?? t W ll 5 a d ny ema a s not to retainthe same against rotation by reason of the utilized r h xpl i o h l a fy 40 great vibration of the lfi'iOtGi',-Whi0i1 is excepgrounded 0 emotortionally pronounced in aviation engine practice. v thus y describede inventifln,

1 The invention consists of the construct-ion, comwhat is claimed as newand desired to be secured bination and arrangement of parts, as hereinilby Letters Patent is:

lustrated, described and claimed. 1. A radio shield. for spark plugscomprising 45 In the accompanying drawing, forming part the combinationof a cylinder head having a cirhereof, is illustrated a form ofembodiment of cular well formed thereon to surround a spark theinvention, in which drawing similar reference plug, said Well having aninside diameter substancharacters designate corresponding parts, and intially larger than a spark plug adapted to he reso which: ceivedtherein, a dielectric cap disposed over the Figure l is a longitudinalsection through the well, said cap having formed thereon a dielectricwall of the cylinder of an internal combustion skirt adapted to extendinto the well adjacent the motor showing the application of theinvention; inner wall of the well and a metallic covering on Figure 2 isa vertical section taken approxithe cap in electrical contact with thewell.

mately on line 2-=-2 of Figure 1 through the wall 2. A spark plug radioshield comprising the combination of a cylinder head provided with aspark plug opening, a cylindrical wall formed on said head as anintegral part thereof around said spark plug opening, a dielectric capdisposed over the outer end oi said wall, said cap having a circularskirt adapted to surround the terminal end of a spark plug seating insaid opening and a metallic covering on said cap in electrical contactwith said wall.

' 3. A spark plug radio shield comprising, in combination, a well formedas an integral part of a cylinder and adapted to surround a spark plugand a shielding cap to cover said well and enclose a spark plug, saidcap comprising a dielectric body having an axial bare to receive theupper end of a spark plug and a radial bore to tending into the wellaround a spark plug and 0 having an axial bore to receive the upper endof a spark plug and a radial bore to receive a spark plug conductor,contact means to connect a conductor with a spark plug and a metalliccovering grounded to the well.

JOSEPH J. MASCUCH.

